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<h1 id="sec_name">
<span data-if="hdevelop" style="display:inline;">dev_update_pc</span><span data-if="c" style="display:none;">dev_update_pc</span><span data-if="cpp" style="display:none;">DevUpdatePc</span><span data-if="dotnet" style="display:none;">DevUpdatePc</span><span data-if="python" style="display:none;">dev_update_pc</span> (算子名称)</h1>
<h2>名称</h2>
<p><code><span data-if="hdevelop" style="display:inline;">dev_update_pc</span><span data-if="c" style="display:none;">dev_update_pc</span><span data-if="cpp" style="display:none;">DevUpdatePc</span><span data-if="dotnet" style="display:none;">DevUpdatePc</span><span data-if="python" style="display:none;">dev_update_pc</span></code> — Switches the update of the PC during program execution on or off.</p>
<h2 id="sec_synopsis">参数签名</h2>
<div data-if="hdevelop" style="display:inline;">
<p>
<code><b>dev_update_pc</b>( :  : <a href="#DisplayMode"><i>DisplayMode</i></a> : )</code></p>
</div>
<div data-if="c" style="display:none;">
<p>
<code>Herror <b>dev_update_pc</b>(const char* <a href="#DisplayMode"><i>DisplayMode</i></a>)</code></p>
<p>
<code>Herror <b>T_dev_update_pc</b>(const Htuple <a href="#DisplayMode"><i>DisplayMode</i></a>)</code></p>
</div>
<div data-if="cpp" style="display:none;">
<p>
<code>void <b>DevUpdatePc</b>(const HTuple&amp; <a href="#DisplayMode"><i>DisplayMode</i></a>)</code></p>
</div>
<div data-if="com" style="display:none;"></div>
<div data-if="dotnet" style="display:none;">
<p>
<code>static void <a href="HOperatorSet.html">HOperatorSet</a>.<b>DevUpdatePc</b>(<a href="HTuple.html">HTuple</a> <a href="#DisplayMode"><i>displayMode</i></a>)</code></p>
</div>
<div data-if="python" style="display:none;">
<p>
<code>def <b>dev_update_pc</b>(<a href="#DisplayMode"><i>display_mode</i></a>: str) -&gt; None</code></p>
</div>
<h2 id="sec_description">描述</h2>
<p><code><span data-if="hdevelop" style="display:inline">dev_update_pc</span><span data-if="c" style="display:none">dev_update_pc</span><span data-if="cpp" style="display:none">DevUpdatePc</span><span data-if="com" style="display:none">DevUpdatePc</span><span data-if="dotnet" style="display:none">DevUpdatePc</span><span data-if="python" style="display:none">dev_update_pc</span></code> specifies the behavior of the PC
during program execution.
If <a href="#DisplayMode"><i><code><span data-if="hdevelop" style="display:inline">DisplayMode</span><span data-if="c" style="display:none">DisplayMode</span><span data-if="cpp" style="display:none">DisplayMode</span><span data-if="com" style="display:none">DisplayMode</span><span data-if="dotnet" style="display:none">displayMode</span><span data-if="python" style="display:none">display_mode</span></code></i></a> is set to <i><span data-if="hdevelop" style="display:inline">'on'</span><span data-if="c" style="display:none">"on"</span><span data-if="cpp" style="display:none">"on"</span><span data-if="com" style="display:none">"on"</span><span data-if="dotnet" style="display:none">"on"</span><span data-if="python" style="display:none">"on"</span></i>, which is the default,
within the selected procedure the PC is always displayed left to the
currently executed operator.
In addition the program text is scrolled---if necessary---so that
the current operator is visible.
</p>
<p>If the mode is <i><span data-if="hdevelop" style="display:inline">'off'</span><span data-if="c" style="display:none">"off"</span><span data-if="cpp" style="display:none">"off"</span><span data-if="com" style="display:none">"off"</span><span data-if="dotnet" style="display:none">"off"</span><span data-if="python" style="display:none">"off"</span></i> the PC is not visible during program execution
and the program text will not be scrolled automatically.
When the program stops the PC becomes visible again and the listing is
scrolled to the current PC position.
</p>
<p>For measuring the execution time of a sequence of operators all
<code>update</code> options should be switched off in order to reduce the
influence of the runtime of GUI updates in HDevelop.
For this 该算子s <code><span data-if="hdevelop" style="display:inline">dev_update_pc</span><span data-if="c" style="display:none">dev_update_pc</span><span data-if="cpp" style="display:none">DevUpdatePc</span><span data-if="com" style="display:none">DevUpdatePc</span><span data-if="dotnet" style="display:none">DevUpdatePc</span><span data-if="python" style="display:none">dev_update_pc</span></code>, <a href="dev_update_time.html"><code><span data-if="hdevelop" style="display:inline">dev_update_time</span><span data-if="c" style="display:none">dev_update_time</span><span data-if="cpp" style="display:none">DevUpdateTime</span><span data-if="com" style="display:none">DevUpdateTime</span><span data-if="dotnet" style="display:none">DevUpdateTime</span><span data-if="python" style="display:none">dev_update_time</span></code></a>,
<a href="dev_update_var.html"><code><span data-if="hdevelop" style="display:inline">dev_update_var</span><span data-if="c" style="display:none">dev_update_var</span><span data-if="cpp" style="display:none">DevUpdateVar</span><span data-if="com" style="display:none">DevUpdateVar</span><span data-if="dotnet" style="display:none">DevUpdateVar</span><span data-if="python" style="display:none">dev_update_var</span></code></a>, and <a href="dev_update_window.html"><code><span data-if="hdevelop" style="display:inline">dev_update_window</span><span data-if="c" style="display:none">dev_update_window</span><span data-if="cpp" style="display:none">DevUpdateWindow</span><span data-if="com" style="display:none">DevUpdateWindow</span><span data-if="dotnet" style="display:none">DevUpdateWindow</span><span data-if="python" style="display:none">dev_update_window</span></code></a> or the
procedures <code>dev_update_on</code> and <code>dev_update_off</code>
can be used.
</p>
<p>This option can also be controlled via the <code>Preferences</code> dialog:
<code>Edit</code> -&gt; <code>Preferences</code>
-&gt; <code>Runtime Settings</code>
-&gt; <code>Update Program Counter</code>.
</p>
<h2 id="sec_attention">注意</h2>
<p>This operator is not supported for code export.
</p>
<h2 id="sec_parameters">参数表</h2>
  <div class="par">
<div class="parhead">
<span id="DisplayMode" class="parname"><b><code><span data-if="hdevelop" style="display:inline">DisplayMode</span><span data-if="c" style="display:none">DisplayMode</span><span data-if="cpp" style="display:none">DisplayMode</span><span data-if="com" style="display:none">DisplayMode</span><span data-if="dotnet" style="display:none">displayMode</span><span data-if="python" style="display:none">display_mode</span></code></b> (input_control)  </span><span>string <code>→</code> <span data-if="dotnet" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="python" style="display:none">str</span><span data-if="cpp" style="display:none"><a href="HTuple.html">HTuple</a></span><span data-if="c" style="display:none">Htuple</span><span data-if="hdevelop" style="display:inline"> (string)</span><span data-if="dotnet" style="display:none"> (<i>string</i>)</span><span data-if="cpp" style="display:none"> (<i>HString</i>)</span><span data-if="c" style="display:none"> (<i>char*</i>)</span></span>
</div>
<p class="pardesc">Mode for runtime behavior.</p>
<p class="pardesc"><span class="parcat">Default:
      </span>
    <span data-if="hdevelop" style="display:inline">'off'</span>
    <span data-if="c" style="display:none">"off"</span>
    <span data-if="cpp" style="display:none">"off"</span>
    <span data-if="com" style="display:none">"off"</span>
    <span data-if="dotnet" style="display:none">"off"</span>
    <span data-if="python" style="display:none">"off"</span>
</p>
<p class="pardesc"><span class="parcat">List of values:
      </span><span data-if="hdevelop" style="display:inline">'off'</span><span data-if="c" style="display:none">"off"</span><span data-if="cpp" style="display:none">"off"</span><span data-if="com" style="display:none">"off"</span><span data-if="dotnet" style="display:none">"off"</span><span data-if="python" style="display:none">"off"</span>, <span data-if="hdevelop" style="display:inline">'on'</span><span data-if="c" style="display:none">"on"</span><span data-if="cpp" style="display:none">"on"</span><span data-if="com" style="display:none">"on"</span><span data-if="dotnet" style="display:none">"on"</span><span data-if="python" style="display:none">"on"</span></p>
</div>
<h2 id="sec_result">结果</h2>
<p>If the values of the specified parameters are correct,
<code><span data-if="hdevelop" style="display:inline">dev_update_pc</span><span data-if="c" style="display:none">dev_update_pc</span><span data-if="cpp" style="display:none">DevUpdatePc</span><span data-if="com" style="display:none">DevUpdatePc</span><span data-if="dotnet" style="display:none">DevUpdatePc</span><span data-if="python" style="display:none">dev_update_pc</span></code> returns <TT>2</TT> (
      <TT>H_MSG_TRUE</TT>)
    .  Otherwise, an
exception is raised and an error code returned.</p>
<h2 id="sec_see">参考其它</h2>
<p>
<code><a href="dev_update_time.html"><span data-if="hdevelop" style="display:inline">dev_update_time</span><span data-if="c" style="display:none">dev_update_time</span><span data-if="cpp" style="display:none">DevUpdateTime</span><span data-if="com" style="display:none">DevUpdateTime</span><span data-if="dotnet" style="display:none">DevUpdateTime</span><span data-if="python" style="display:none">dev_update_time</span></a></code>, 
<code><a href="dev_update_window.html"><span data-if="hdevelop" style="display:inline">dev_update_window</span><span data-if="c" style="display:none">dev_update_window</span><span data-if="cpp" style="display:none">DevUpdateWindow</span><span data-if="com" style="display:none">DevUpdateWindow</span><span data-if="dotnet" style="display:none">DevUpdateWindow</span><span data-if="python" style="display:none">dev_update_window</span></a></code>, 
<code><a href="dev_update_var.html"><span data-if="hdevelop" style="display:inline">dev_update_var</span><span data-if="c" style="display:none">dev_update_var</span><span data-if="cpp" style="display:none">DevUpdateVar</span><span data-if="com" style="display:none">DevUpdateVar</span><span data-if="dotnet" style="display:none">DevUpdateVar</span><span data-if="python" style="display:none">dev_update_var</span></a></code>
</p>
<h2 id="sec_module">模块</h2>
<p>
Foundation</p>
</div>
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